Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42536611a4dc8e9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 08:52:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b289e482649ca0e9463c7827c8eba8c7 SHA-1: 379e7b986cd76e96904b8c417a29502c7c0d10c0 SHA-256: c42536611a4dc8e94471d9fc3223e33ebf7061b5468948a56f01fdb447fe9989
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources related to game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, suggesting a tactic to attract users searching for these terms. The ML classifier also strongly flagged this PDF as malicious. The document's purpose appears to be to drive traffic to these external sites, likely for monetization or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/free-coin-master-spins-blog-game-hack PDF link annotation
    • http://elib-sd.msj.mis.sch.id/library/repository/dragonball-online-revelations-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/robux-hack-for-real_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/robux-cheat-engine-no-survey_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-boku-no-roblox-remastered-hack-script_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-hack-robux-into-your-car_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/script-roblox-hack-exploits_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/nuevo-hack-de-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-noclip-no-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-apk-download-free_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-no-pass-or-survey_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-robux-right-now_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-promo-codes-2021-september_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-hack-in-bakiez-bakery-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-play-roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/execute-scripts-notmallyso-sorunu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-hack-khol-admin-perm-codes_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-cheat-spinbot_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/apps-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3097 22728 bytes
SHA-256: 56e07e317fc0ace6b5bb9549d9ebb3a23a24e5d4ef0ec8ad1d12cb08dfc26d63
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 18464 bytes
SHA-256: 4bcaff5a2789d7186c9fa4ee96d365b8eba602a20bbe86fe3da838c25a781984

Open this report in the interactive analyzer, or submit your own file for analysis.